Use github container registry

Author: xrmx

.github/workflows/build-images.yml

@@ -8,6 +8,7 @@ env:
   DOCKER_BUILDKIT: 1
 
 permissions:
+  packages: write
   contents: read
 
 jobs:
@@ -17,20 +18,13 @@ jobs:
     steps:
 
       - uses: actions/checkout@v4
-          
-      - name: Login to docker.elastic.co
-        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3.4.0
-        with:
-          registry: ${{ secrets.ELASTIC_DOCKER_REGISTRY }}
-          username: ${{ secrets.ELASTIC_DOCKER_USERNAME }}
-          password: ${{ secrets.ELASTIC_DOCKER_PASSWORD }}
 
-      - name: Login to dockerhub
+      - name: Login to ghcr.io
         uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3.4.0
         with:
-          registry: ${{ secrets.DOCKERHUB_REGISTRY }}
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_PASSWORD }}
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
 
       - run: ./util.sh --action build
         working-directory: .ci/docker